Burner



' supplied.

Patented May 7, 1929.

{TED STATE 1,711,982 PATENT(OFFICE.

LIEaLE ARGO AND EAR-2Y1. VINES, 6F LOS ANGELES, CALIFOBNIAQ BURNER.

Application. filed r, 1 32?. Serial at. 173,238.

duction or the i I p D I It is the prnnar ob ect or this invention to provide a novel form of adjustable nozzle wherein th' eons j.--.c.l is introduced to an aimular ope rig surrounoing the air etc '11 i i tinducing nozzle. In adci ion to the bror ler objects oi this invention there re certain dotails of structure whereby a s] p icah and ehicient burner is obtained.

These objects together with other objects and corresponding accompiislnnents are ob tained by means of the embodiment of our invention illustrated in the accompanying drawing, in which: 1

Fig. l is an axial section through a complete combination burner; Fig. 2 an elex'a tion partly in section as seen on a plane at right angles to'Fig. 1 showing the mix ng member; and F 3 is a section as seen on the line 33 of Fig. 1, with portions of the shutter broken away.

Referring more particularly to the drawing and especially Fig. 1, an induction nozzle or tube A is shown through which steam or 7 air is introduced under pressure and through whichoil or fluid. may be induced. Mounted over the end of the induction tube is an air shell B. Adjustably mounted upon the end of the air shell is the mixing member C provided with a acket through which gas is The gas enters the tubular portion of the inixingchamber through an annular orifice provided between the mixing member and the shell.

v The Oil unit comprises a tube elseeured to acoupling member 5 having an extension to receive a pipe 6 through which orsteam is supplied. At the end or rear oi the coupling member 5 is a stuifing box or gland 7. lit the front of the tube 4 is a conical nozzle 8 secured thereto by a suitable thread. Ere tending through the center of: the tube 4 is an oil tube 9 having a conical nozzle 10 secured to the forward end thereof and connected within the nozzle 8 to provide a space around the nozzle 9 for the passage of or steam. The enlargement 11 may be of spider form to hold the ends oi the tube 9 securely in position. The rear of tube 9 extends through the stuffing box 7 and coupling member 12 to a fitting 13. Fitting 13 has one branch connected to a pipe let for supplying oil. The 1 end of tube 9 haslateralports and secured hereto is a stem 15 with a hand wheel 16 whereby the tube 9 may be adjusted forwardly and baclrwardly within the tube d and thereby the area of the space through which airor steam passes to the end of the nozzle '8 from which it is project-ed may be adjusted.

Obviously, steam or air introducedthrough pipe ,6 w ll induce oil through the nozzle 8.

, The shell B comprises a bell shaped member 17 having the large end open and an arm 18 extending thereacross to. the center at which there is a hub 19 having a bore internallythreaded to engage with the threads on fittings ment with respect to the tube and thereby enable adjustment of the nozzle 8.. There are bosses at the outer edge toprovide for pivot pins 20. Pivotally mounted upon each pin to provide for longitudinal adjustis a quadrant shutter member 21 having a q finger hold projecting therefrom. The shutters 21 have a suiiiciently tight mounting so they will remain in any position into which they are swung. The forward condor throat of the such is b'evelled'to provide one wallet an annular oril'ice. ,There is an enlargement around the reduced end of the shell exteriorly threaded to serve as a mountii g 'tor the n'iixing member C. it will be noted that the air shell is beyond the end of the nozzle. 8. The' nixing member con'iprises a tubular portion having an inner end opposin the. endo is air shell and forming therewith the ani'iular orifice 25. Surrounding the tubular member is a jacket wall 26, projectingreaiw wardly beyond the orifice end of the tubular member and internally threadedto engage the enlargen'ient Opening in to the in chat is an inlet for gas indicated by 27.

The burner is mounted in position p ,1 within a draft opening in a furnace. The pipe leading to the opening 27, is connectedtothe gas supply. The pipe 6 isconnected either to a compressed air supply line or to a steamiline. Pipe 14 may be connectedto an oil supply line. The burner is then in condition to be used as a combination burner. The steam passing through nozzle 8 will vaporize the oil. The gas passes throu h theannular orifice 25 and induces air through shell B. The size of the orifice 25 may be adjusted by rotating the shell B. The amount of air passing through the air shell can also be adjusted by the shut-' ters 21. The amount of oil is adjusted by means of the hand wheel 16 which locates the so I nozzle 10 longitudinally within nozzle 8. The projected fluids comprise a stream having a core including air which is surrounded by an envelope of gas. This issues from the burner and draws with it an outer envelope of air. Obviously the burner may be used as a gas burner alone by closing the supply line for oil and steam. In this case the gas induces the air and a stream having an air core and gas envelope is provided.

The burner is an induction burner and the inductive action depends upon the length of the shell C, the freedom of the path of flow of air and the port area of the air inlets. In the present construction, there is a direct substantially straight line flow, the cross section progressively decreasing toward the throat to provide a passage of little impedance to the flow of air, the enlarged end of the bell with air ports results in an intake of a large volume of air at atmospheric pressure. The velocity of the induced air is increased toward the throat with a maximum at the annular gas opening 25 so as to induce a large volume of air commensurate with the volume of gas entering the port 25, the latter being adj ustable to permit a proper adjustment of the airgas ratio.

What we claim is:

1. In a burner, an injector tube normally fixed in position and having a nozzle, an air shell about said tube, said shell being of reduced diameter at said nozzle forming therewith an induction nozzle and having an annular enlargement on the reduced end provided with a thread, the end of said shell forming a wall of an annular orifice inclined outwardly, a mixing member having a tubular portion serving as a continuation of said reduced end and mounted upon the threaded enlargement whereby to adjust said orifice opening.

2. In an induction burner, an air shell of bell shape progressively decreasing in crosssection toward the throat and having air openings at the large end in communication with the atmosphere and. facing in the direction of the axis of said shell, a circumferential gas supply member mounted on and having an annular port communicating with the boreof said shell and directing gas thereto in the direction of flow of air to form an envelope surrounding the air stream, and a mixing chamber constituting a continuation of form a tubular envelope of gas surrounding I the air stream, said gas supply member being adjustable on said shell to vary the annular port and control the air-gas ratio.

at. In an induction burner, an air shell of bell shape progressively decreasing in crosssection toward the throat and having air inlets at the large end open to the atmosphere and facing in the direction of the axis of said shell, a tubular gas supply member mounted over said throat and having an adjustable annular orifice for the introduction of an envelope of in the direction of fiow of air and about the air passing through said throat, and mixing chamber constituting a continuation of said throat of the same diameter beyond said orifice and of substantial length.

5. In a burner, an injector tube normally fixed in position having a nozzle, an air shell about said tube, said shell being of bell shape decreasing progressively in cross-section toward the throat and having air inlets at the large end open to the atmosphere and facing the direction of the axis of said shell, said shell being movable for longitudinal adjust ment with respect to said tube, the end of said shell projecting beyond said nozzle and forming therewith an induction nozzle and having an end wall forming a part of an annular orifice outwardly inclined, a tubular mixing member mounted on the end of said shell and having a jacket with a gas inlet, said member having an end wall forming the other portion of said annular orifice and being movably mounted on said shell for longitudinal adjustment of said orifice.

In witness that we claim the foregoing We have hereunto subscribed our'nanies this 11th day of August, 1926.

LISLE T. ARGO. HARRY L. VINES. 

